Tien Tran logged into his wife’s Roth IRA one afternoon to check on a solar energy stock. Instead, The New York Times reports, he stumbled onto a nightmare — nearly half of her retirement holdings, worth about $120,000, had vanished. (1) The securities had been quietly transferred from her Vanguard account to a Merrill Edge account — without her authorization. A criminal had opened two new accounts in her name and initiated the transfer using the Automated Customer Account Transfer Service, or ACATS, a sy ...